Improved compound for extinguishing fires



trl tam gate (Mi lie.

ELI THAYER, OF NEW YORK, N.

Y., ASSIGNOR TO PAUL" P. TODD,

OF BOSTON, MASSACHUSETTS.

Letters Patent No. 91,883, dated June 29, 1869; antedated June 11, 1869.

IMPROVED COMPOUND FOR EXTING-UISHING- FIRES.

The Schedule referred to in these Letters Patent and making part of thesame.

Be it known that I, Em THAYER, of the city, county, and State of NewYork. haveinvented certain new and useful Compounds, or Mixtures for thePurpose of Extinguishing Fires; and 1 do hereby declare that thefollowing is a full and exact description thereof. 7

The nature of my invention consists in impregnating the water used inextinguishing a fire, with certain ingredients dissolved therein, ormixed therewith, before the water is projected upon the fire.

By this method two objects are gained, each conducive to theextinguishment of the fire. One is the creation, by the decomposition ofthese ingredients, of an atmosphere, in which combustion is impossibleand the'other is the coating over of the combustible substances exposedto the tire, by the melting or liquefying of some of the ingredients ofthe mixture, or compound.

The substances of important use for this purpose, are carbonate of lime,muriate of ammonia, chloride of lime, muriate of soda, nitrate ofammonia, nitrate, phosphate, carbonate, and bicarbonate of soda, and thesalts of potassium, aluminum, and magnesia,.and sal ammomac.

I do not claim any particular form of vessel in which thisadmixture, orsolution may be made, nor any particular method of projecting, whenmade, upon the fire; but

What I claim, and desire to secure by Letters Patent is 1. Asolution ofmuriate of ammonia, in combination with carbonate or bicarbonate ofsoda, or their equivalent, for the extinguishing of fire, substantiallyas set forth.

2. Asolution of sal ammoniac, in combination with nitrate or phosphateof soda, for extinguishing fire,

substantially as set forth.

3. A mixture of water, carbonate of lime, and muriate of soda, forextinguishing fire, substantially as set forth.

ELI THAYER.

Witnesses:

ALEX. OSTRANDER,

B. FRANKLIN CLARK.

